Grinding Wheels For High Speed Applications

New Product Announcements From: 6/18/2008 Modern Machine Shop

The company offers an array of grinding wheels including Black Magic disc wheels that are suitable for dry grinding a range of spring materials; cBN button wheels for high speed, dry grinding applications; superabrasive disc wheels for grinding hard or difficult-to-grind materials; and custom-designed and engineered wheels that use ceramic grain to increase wheel life and reduce dressing. The Black Magic disc grinding wheel features a bond material that incorporates induced porosity with internal lubricants. This design is said to allow improvement in dry spring grinding when compared with traditional magnesite-bonded wheels. By reversing the direction of the grinding wheels every 3 to 4 hours, downtime for dressing can be virtually eliminated, the company says. The company also offers its grinding wheel that uses bonded cBN for dry grinding of springs. The wheel design features multiple layers of cBN, which is said to result in a more consistent finish and better performance at speeds of 10,000 sfm or higher when compared to single-layer electroplated cBN wheels. The cBN matrix uses a fine grain for a fine finish. The spacing between the matrix is filled with a composition designed to wear at a similar rate as its cBN-bearing matrix. Thus, the wheel produces the same fine finish throughout the life of the grinding wheel, the company says. The cBN matrix layers have been processed regularly with depths of 1" (25 mm). According to the company, another advantage of the bonded cBN wheel is reduced heat damage. The wheels are designed to achieve an interrupted spring end cut, allowing the heat of the grind to dissipate faster than a continuous cut, the company says. Smaller cBN grain develops low heat per grain cut path. With these features, the bonded cBN wheel is suitable for high speed spring grinding in a variety of hard metals, including stainless steel, chrome vanadium, chrome silicon, music wire and titanium.

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